Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe59d0e7e069f849…

MALICIOUS

PDF

70.4 KB Created: 2020-12-31 08:47:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 02dc7618aeb698d3e0f7c5fe99356c56 SHA-1: 29e390df7286e5881d61ef9f33d7a0c5ad260935 SHA-256: fe59d0e7e069f8494f9bbce93f7066c702751428e61badfa055611846aedfbc5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains embedded links that point to known malicious redirector infrastructure, specifically 'https://traffmen.ru/strik?utm_term=41148+lego+price'. Heuristic analysis and ML classification strongly indicate malicious intent, with ClamAV also detecting it as a phishing trojan. The document body appears to be heavily obfuscated or corrupted, but the presence of the malicious URL is the primary indicator of the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffmen.ru/strik?utm_term=41148+lego+price In PDF document text
    • https://cdn-cms.f-static.net/uploads/4490269/normal_5fb6b621149a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467036/normal_5fd2ac9d2fd26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374362/normal_5f9f2b3bc5d3c.pdfIn PDF document text
    • https://cdn.sqhk.co/vurelakixu/ijhcShb/zofusi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449771/normal_5fd8797e08fb8.pdfIn PDF document text
    • https://cdn.sqhk.co/fujalapevame/jjgBsBu/water_slide_rentals_near_mesquite_tx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/como_aprender_a_aprender_ingles.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/indeed_assessment_answers_graphic_design.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/lalomumu.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/97446649984.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/bedijulewaretikajawubo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AF 4952 bytes
SHA-256: 2f93136ed9a7bb8179d56148c6176bf0685b8ac1ee83ee756ea6a125f38b6d19
font_01_sfnt_off0000e8ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AB 10888 bytes
SHA-256: 1b733210b3e52deee4d9e9c751c25a91edd0f7bcb085b522c405590d7976131a